Grinding-machine.



Patented July 24, I900.

s. K Mums. GRINDING MACHINE.

(Application filed Jan. 22, 1900.)

3 Sheets-Sheet (No Model.)

3 4 7 7 a I Z W No. 654,234. Patented My 24, I900. S. K. DENNIS.

' GRINDING MACHINE.

(Application filed Jan, 22, 1900.)

3 Sheets-Sheet 2,

(No Model.)

No. 654,234. Patented July 24, 1900.

s K DENNIS GRINDING MACHINE.

(Application filed Jan. 22, 1900.)

3 Sheets$heet 3,

(No Model.)

I mp aamlz r jig 'UNHED STATES PATENT Futon.

SAMUEL K. DENNIS, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE PLANOMANUFACTURING COMPANY, OF SAME PLACE.

GRINDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 654,234, dated July 24,1900 Application filed January 22, 1900. Serial No. 2,258. (No model.)

To ctZZ w7t0m/ it may concern.-

Be it known that I, SAMUEL K. DENNIS, a residentof Chicago, in thecounty of Cook and State of Illinois, have invented certain new anduseful Improvements in Grinding-llachines, of which the following is aspecification.

My invention relates to certain improvements in that class ofgrinding-machines which are commonly known as sickle-grinders and whichare specifically adapted to grind the blades of sickle-bars for mowingand reaping machines, but which may also be used for grinding otherdevices.

My invention relates more specifically to that class of sickle-grindersin which the rotating grinding-stone is mounted in a frame which isvibrated as the stone is rotated, so

- as to grind the different portions of the blades,

and is concerned, primarily, with the mechanism by which this automaticvibration is given to the frame carrying the grinding wheel or stone.

It is further concerned with the construction by which the vibratingmechanism can be thrown out of operation and the stone be held in afixed position, where it may be employed as a universal grinder.

My invention is finally concerned with the novel mechanism employed foradjusting the stone in different positions to vary the position it shallassume during its vibrations.

.Referring to the accompanying sheets of drawings, in which the samefigures ofreference are used to designate identical parts in all theviews, Figure l is a plan View of a complete machine, except that thesickleholder, which may be of any desired construction, is omitted. Fig.2 is a similar fragmentary View partly broken away and with the clutchmechanism in another position from that occupied byit in Fig. 1. Fig. 3is a sectional view through the clutch mechanism, as on the line A A ofFig. 2, but on an enlarged scale. Fig. 4 is a similar detail in sectionon the same line, but looking in the opposite directioni.'e., toward themachine. Fig. 5 is a central vertical section on the line B B of Fig. 1.Fig. 6 is a rear elevation of a portion of the machine. Fig. 7 is avertical Fig. 8 is a section on the line C C of Fig. 5.

fragmentary view in section on the line D D of Fig. 7, and Fig. 9 is aside elevation of the cam and worm-wheel disk detached.

The base 1 of the machine may be of any desired shape and constructionto support the grinding mechanism, but preferably consists of arectangular plate having the supports 2 formed on the under side thereofand terminatingin the hooks 3,which are adaptedto take overtheedgeofsome convenientsupport,sucl1 as the bull-Wheel of aharvesting-machine, to which it may be securely clamped by a bolt at,passing through a centrally-located aperture 5 in the base-plate. Oneend of the base-plate may be made higher than the rest, as at 6, andprojecting upwardly therefrom and preferably formed integral with saidbase are the standards 7 ,which together form a bearing-yoke, the upperends being formed with the bearings 8, in which is journaled the shaft9. Journaled upon this shaft 9 is the frame 10, which is supported bythe bearings 11, projecting upwardly therefrom and mounted just insideof the bearings 8, previously referred to. Also journaled upon thisshaft 9 and between the bearings 11 is the swinging frame l2,which issupported upon the shaft 9 by the bearings 13, which in turn are locatedjust within the bearings 11. The frame 12, just between the bearings 13,is provided with the substantially semicylindrically-shaped cap 14, fromwhich project the arms 15, which are of the shape best shown in the planview in Fig. 1 and which terminate in the bearings 16 for thegrinding-wheel shaft 17, which has secured thereon to rotate therewiththe grinding-wheel 18, which I preferably form of a considerablediameter, so as to give weight thereto and a constant steadiness ofmotion to the machine while it is being operated. Upon theouter end ofthe shaft 17, outside of the bearing 16, I secure the gearpinion 19,which is engaged by the gear-wheel 20, which is loosely mounted on theouter end of the shaft 9 and provided'with the handle 21, by which itmay be turned. If the wheel 20 is free to turn on the seaft 9, as is thecase under certain conditions, and if the frame 12 is held from swingingmovement by the mechanism to be described, it will be appar out that asthe wheel 20 is rotated slowly by ICO the handle 21 the grinding-wheel18 will be rotated rapidly and will remain in a fixed position, duringwhich time it can be used as a universal grinder for grinding any toolsor implements desired.

The portion of the shaft 9 between the bearings 13 is provided, as bestshown in Fig. 7, with a worm-gear 22, which is rigidly secured thereto,as by the pin 23. As the shaft 9 is rotated when the driving-wheel isclutched thereto, this worm-gear 22, meshing with the teeth 24 on theworm-gear and cam-disk 25, serves to rotate said disk slowly. This diskis mounted on a pintle or bearing preferably formed by passing a stud orbolt 26 therethrough, the said bolt having the reduced portion 27,forming the shoulder 28, which takes against the end of the support 29,which is preferably cast integral with the back of the frame 10, thebody portion of which is preferably shaped somewhat like a scoop, so asto inclose the disk on its lower and outer sides. The reduced portion 27of the bolt 26, passing through the' aperture their correspondingcarmflanges 31 and 32, I

preferably form an adjustable bearing-surface on one of them, as 34, bypassing a roundnosed bolt 35 therethrough and securing the same inplace, as by a lock-nut 36. By means of this bearing I am enabled totake up any wear that may be occasioned by the use of the machine.

As previously stated, the working surfaces of the cams 31 and 32 arecomplementary,

the cam 31 being depressed where the cam 32 is raised, so that thedistance between the adjacent points of the two cams is always the same.Each of the cams being provided with two depressions and twoprojections, it will be apparent that as the shaft 9 rotates and thecam-disk 25 is slowly rotated thereby each complete rotation of thecam-disk 25 will give two complete vibrations up and down to the frame12, which carries the grindingwheel.

As previously explained, it is desirable at times to throw the cam-disk25 out of operation, so that the grinding-wheel may be rotated withoutvibrating it in any position to which it may have been moved, thus adapting the machine for use as a universal grinder. For the purpose ofreadily preventing its vibration with the minimum motion of the partsthe driving-wheel 20 is loosely journaled on the end of the shaft 9 anda clutch mechanism is interposed between the shaft and the wheel. Thisclutch mechanism is preferably formed as best shown in Figs. 1 to 4,where it will be seen that I have provided the wheel 20 with theoppositely-disposed segmental lugs or projections 37, which are adaptedto cooperate with the notches 39 and 40, formed on the inner edge of'the sleeve 41, which constitutes a part of the clutch mechanism. Thenotches 39 extend entirely through to the circular aperture formed inthe center of the sleeve 41, while the notches 40 extend inwardly onlyfar enough to accommodate the lugs 37, thus leaving the surfaces 41 onthe same level with the inner face of the end of the sleeve. In thesesurfaces 41 I preferably form the slight grooves 42,which are adapted tocodperate with the pin 43, secured to and passing through the shaft 9,when the parts are in the position shown in Fig. 2. The outer end of thesleeve 41 is cut away on its inside to accommodate the helically-coiledexpanding spring 43, which is secured between the inner portion 44 ofthe sleeve 41 and the washer 45, secured on the outer end of the shaft9.

It will be apparent that when the parts are in the position shown inFig. l the pin 43 of the shaft engaging with the inner portions of thenotches 39 will clutch the sleeve 41 to the shaft, and with the lugs 37on the drive-wheel 2O engaging with the outer portions of the notches 39will clutch the wheel 20 to the sleeve 4], and thus the wheel 20 isultimately clutched to the shaft 9. It will also be equally apparentthat when the parts are moved to the position shown in Fig. 2 the pin 43engaging with the recesses 42 will hold the lugs 37 out of clutch withthe notches 40, so that.

as the wheel is turned the shaft will not be actuated. It will also beapparent that the sleeve 41 is held yieldingly in this unclutchedposition, so that it can be tu rned by applying a slight force to theboss 46 on the outer surface of said sleeve.

It-is desirable in this class of machines to furnish means for adjustingthe position of the are through which the grinding-wheel shall swing,and I have devised a novel combination for this purpose. As theseadjustments have been hitherto made, the adj ustments were usuallyformed by a nut cooperating with a segmental slot, so that any desireddegree of adj ustment could be obtained. These adjustments have beenfound to be unsatisfactory, as there is the constant tendency to slip,and to obviate this difficultyI provide a simple and positive adjustmentto two or more positions, two positions being all that is ordinarilyrequired, as the majority of the blades of a sicklebar have to be groundto a maximum depth, while a few at the pitman end of the blade can onlybe ground to a minimum depth on account of interfering with the bar towhich the pitman is connected. For the purpose of forming this positiveand quickly-operated adjustment I secure upon the base 2, preferablyupon the upper side of the projection 6, a strong flat leaf-spring 47,which may be secured in place by the set-screw 48 and movement thereof,

except in a Vertical direction, prevented by its being placed in thechannel 49. Formed at suitable intervals apart in this leaf-spring 47are the apertures 50 and 51, which cooperate with the lug 52, projectingdownward from the bottom of the frame 10. It will be readily seen thatwhen thelug 52 is in the aperture 51 the frame 10 is swung backward, sothat the grinding-wheel will swing down far enough to give the maximumgrinding to the blades, and that when the blades are reached to whichthe minimum grinding is to be given all that is necessary to be done isto press down the end 53 of the spring 47 until the lug 52 is freed fromthe aperture 51, after which the frame 10 is swung into position tocooperate with the aperture 50, in which position it will be seen thatthe grinding-wheel will only descend low enough to give the minimumgrinding to the blades.

Any desired form of a sickle-holder may be employed to present thesickle yieldingly to the grinding-wheel, and I have not illustrated theholder, inasmuch as it forms no part of my invention, which is concernedwith the mechanism heretofore shown and described.

While I have shown my invention as embodied in the form which I atpresent consider best adapted to carry out its objects, it will beunderstood that it is capable of modifications and that I do not desireto be limitedin the interpretation of the following claims, except asmay be necessitated by the prior art.

What I claim as new, and desire to secure by Letters Patent of theUnited States, is--- 1. In a device of the class described, thecombination with the stationary frame having the shaft with theworm-gear thereon.

journaled therein, of a cam-disk mounted to rotate in said frame andhaving teeth on its periphery cooperating with said worm-gear, and aswinging frame pivotally mounted in said stationary frame andcooperating with said cam-disk so that as the shaft is rotated theswinging frame will be slowly reciprocated.

2. In a device of the class described, the combination with thestationary frame having the shaft with the worm-gear thereon journaledtherein, of an auxiliary frame pivoted on said shaft and adjustable tovaryits position relative to the main frame, a camdisk mounted to rotatein said auxiliary frame and having teeth on its periphery cooperatingwith said worm-gear, and a swing ing frame pivotally mounted in saidstationary frame and cooperating with said camdisk so that as the shaftis rotated the swinging frame will be slowly reciprocated.

3. In a device of the class described, the combination with thestationary frame having the shaft with the worm-gear thereon journaledtherein, of a cam-disk mounted to rotate in said frame and having teethon its periphery cooperating with said worm-gear, a

stationary frame and cooperating with said cam-disk so that as the shaftis rotated the swinging frame will be slowly reciprocated, a

grinding-wheel journaled in said swinging frame, and means for rotatingit and said shaft, said means comprising a gear-pinion on thegrinding-wheel shaft, a driving-wheel mounted on the main shaft andhaving gearteeth meshing with said pinion.

5. In a device of the class described, the combination with thestationary frame having the shaft with the worm-gear thereon journaledtherein, of a cam-disk mounted to rotate in said frame and having teethon its periphery cooperating with said worm-gear, a swinging framepivotally mounted in said stationary frame and cooperating with saidcam-disk so that as the shaft is rotated the swinging frame will beslowly reciprocated, a grinding-wheel journaled in said swinging frame,and means for rotating it and said shaft comprising a gear-pinion on thegrinding-wheel shaft, a driving wheel loosely mounted on the main shaftand having gearteeth meshing with said pinion, and clutch mechanismbetween said driving-wheel and said main shaft.

6. In a device of the class described, the combination with thestationary frame having the shaft with the worm-gear thereon journaledtherein, of an auxiliary frame pivoted on said shaft and adjustable tovary its position relative to the stationary frame, a cam-disk mountedto rotate in said auxiliary frame and having teeth on its peripherycooperating with said worm-gear, a swinging frame pivotally mounted insaid stationary frame and codperating with said cam-disk so that as theshaft is rotated the swinging frame will be slowly reciprocated,agrinding-wheel journaled in said swinging frame, and means for rotatingit and said shaft.

7. In a device of the class described, the combination with thestationary frame having the shaft with the worm-gear thereon journaledtherein, of a disk mounted to rotate in said frame and provided withteeth on its periphery cooperating with said wormgear and supplementalcam-flanges pr0ject ing from its opposite faces, and a swinging framepivotally mounted in said stationary frame and having a pair of fingerscooperating with said cam-flanges so that as the shaft is rotated theswinging frame will be slowly reciprocated.

8. In a device of the class described, the combination with thestationary frame having the shaft with the wormgear thereon journaledtherein, of a disk mounted to rotate in said frame and provided withteeth on its periphery cooperating with said wormgear and supplementalcam-flanges projecting from its opposite faces, and a swinging framepivotally mounted in said stationary frame and having a pair of fingerscooperating with said cam-flanges so that as the shaft is rotated theswinging frame will be slowly reciprocated, one of said fingers havingan adjustable bearing formed by a set-screw passing therethrough andhaving its end arranged to cooperate with the adjacent cam-flange.

9. In a device of the class described, the combination with thestationary frame having a driving-shaft journaled therein, of anauxiliary frame supported thereby, a swinging frame pivotally mountedtherein, connections between said shaft and the swinging frame wherebythe rotation of said shaft causes the swinging of the frame, the placeof vibration being controlled by the position of the auxiliary frame,and spring-catch connections between the main and auxiliary frames torigidly connect them in any desired position of adjustment.

10. In a device of the class described, the combination with thestationary frame having a driving-shaft journaled therein, of anauxiliary frame supported thereby, a swingin g frame pivotally mountedtherein, connections between said shaft and the swinging frame wherebythe rotation of said shaft causes the swinging of the frame, the placeof vibration being controlled by the position of the auxiliary frame,and spring-catch connections between the main and auxiliary frames torigidly connect them in any desired position of adjustment, saidconnections comprising a stiff leaf-spring supported by the stationaryframe and located adjacent said auxiliary frame at its free end andprovided with two or more apertures therein, and a lug on said auxiliaryframe adapted to enter said apertures.

11. In a device of the class described, the combination of a stationaryframe having a driving shaft journaled in the standards thereof, with ayoke-shaped auxiliary frame pivotally mounted in said standards betweenthe standards of the main frame, a swinging frame also mounted on saidshaftbetween the bearings of the auxiliary frame, and connectionsbetween said shaft and said swinging frame to cause the reciprocation ofthe swinging frame as the shaft is rotated.

12. In a device of the class described, the combination of thestationary frame having a driving-shaft journaled in the standardsthereof, adrivingwheel mounted on said shaft and provided withgear-teeth on or adjacent to its periphery, with a yoke-shaped frame, agrinding-wheel journaled in the outer end of the swinging frame upon ashaft provided with a pinion meshing with said gear-teeth,andconnections between said driving-shaft and said swinging frame to causethe reciprocation of the frame as the shaft is rotated.

13. In a device of the class described, the combination of thestationary frame having a driving-shaftjournaled therein, with aswinging frame having a grinding-wheel journaled therein pivotallymounted thereon, connections between said drivingshaft and theswingingframe for reciprocating said swinging frame as the shaft isrotated, a drivingwheel loosely mounted on said shaft, drivingconnections between said wheel and the grinding-wheel, and clutchconnections between said shaft and wheel whereby the shaft can berotated with the wheel when desired.

14. In a device of the class described, the combination of thestationary frame having a driving-shaf t journaled therein, with a swinging frame having a grinding-wheel journaled therein pivotally mountedthereon, connections between said driving shaft and the swinging framefor reciprocating said swinging frame as the shaft is rotated, adrivingwheel loosely mounted on said shaft, driving connections betweensaid wheel and the grinding-wheel, and clutch connections between saidshaft and wheel whereby the shaft can be rotated with the wheel whendesired, said connections comprising the pin on the shaft, projectionson the driving-wheel, and

a sliding sleeve having notches adapted to cooperate with the pin on theshaft and the pro jections on the driving-wheel to connect the sleeve tothe shaft and to the wheel.

15. In a device of the class described, the combination of thestationary frame having a driving-shaftjournaled therein, with aswingingframe having a grinding-wheel journaled therein pivotally mountedthereon, connections between said driving shaft and the swinging framefor reciprocating said swinging frame as the shaft is rotated, adrivingwheel loosely mounted on said shaft, driving connections betweensaid wheel and the grinding-wheel, and clutch connections be.- tweensaid shaft and wheel whereby the shaft can be rotated with the wheelwhen desired, said connections comprising the pin 43 on the shaft, theprojections 37 on the driving-wheel having their inner ends beyond theouter end of the pin 43, and a sliding sleeve in the outer end of theshaft having the notches 39 adapted to cooperate with the pin 43 and theprojections 37.

16. In a device of the class described, the combination of thestationary frame having a drivin g-shaft j ournaled therein, with aswinging frame having a grinding-wheel journaled therein pivotallymounted thereon, connections between said driving shaft and the swingingframe for reciprocating said swinging frame as the shaft is rotated, adrivingwheel loosely mounted on said shaft,udriving connections betweensaid wheel and the grinding-wheel, and clutch connections between saidshaft and wheel whereby the shaft can be rotated with the Wheel whendesired, said connections comprising the pin 43 on the shaft, theprojections 37 on the driving-wheel having their inner ends beyond theouter end of the pin 43, and the sleeve mounted on the outer end of theshaft and having the notches 39 adapted to cooperate with the pin 43 andthe projections 37 and the recesses 42 cooperating with the pin 43.

17. In a device of the class described, the combination of thestationary frame having a driving-shaft journaled therein,with aswingingframe having a grinding-Wheel journaled therein pivotally mountedthereon, connections between said drivingshaft and the swinging framefor reciprocating said swinging frame as the shaft is rotated, adrivingwheel loosely mounted on said shaft, driving connections betweensaid Wheel and the grinding-wheel, and clutch connections between saidshaft and wheel whereby the shaft can be rotated with the wheel whendesired, said connections comprising a pin on the shaft, projections onthe driving-wheel a sliding sleeve having notches at its inner endadapted to cooperate with the pin on the shaft and the projections onthe driving-wheel to connect the sleeve to the shaft and the Wheel, anda spring to hold said sleeve yieldingly in contact with the pin on theshaft and the projections on the Wheel.

18. In a device of the class described, the combination of thestationary frame having a driving-shaft j ournaled therein, with aswinging frame having agrinding-wheel journaled therein pivotallymounted thereon, connections between said driving-shaft and the swingingframe for reciprocating said swinging frame as the shaft is rotated, adrivingwheel loosely mounted on said shaft, driving connections betweensaid wheel and the grinding-wheel, and clutch connections between saidshaft and wheel whereby the shaft can be rotated with the wheel whendesired, said connections comprising the pin 43 on the shaft, theprojections 37 on the driving-wheel having their inner ends beyond theouter end of the pin 43, the sliding sleeve mounted on the outer end ofthe shaft and having the notches 39 cooperating with the pin 43 and theprojection 37 and the recesses 42 cooperating with the pin 43, andaspringinterposed between the end of said shaft and the sleeve to holdthe latter yieldingly in contact with the pin on the shaft and theprojections on the wheel.

SAMUEL K. DENNIS. Witnesses:

E. J. TAYLOR, J. F. ADAMS.

